Question: A small sphere having diameter of 2 cm and maintained at 475oC is contained in a cube having dimensions of 6 cm on a side

A small sphere having diameter of 2 cm and maintained at 475oC is contained in a cube having dimensions of 6 cm on a side and maintained at 300 K. The emissivity of the sphere is 0.5 and the emissivity of the cube is 0.7. Calculate the radiation heat lost by the sphere using charts in this chapter.

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